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Diffstat (limited to 'arch/arm/mach-exynos4/mct.c')
-rw-r--r--arch/arm/mach-exynos4/mct.c166
1 files changed, 97 insertions, 69 deletions
diff --git a/arch/arm/mach-exynos4/mct.c b/arch/arm/mach-exynos4/mct.c
index ddd86864fb83..eb182f29f48f 100644
--- a/arch/arm/mach-exynos4/mct.c
+++ b/arch/arm/mach-exynos4/mct.c
@@ -20,19 +20,31 @@
#include <linux/delay.h>
#include <linux/percpu.h>
+#include <asm/hardware/gic.h>
+
+#include <plat/cpu.h>
+
#include <mach/map.h>
+#include <mach/irqs.h>
#include <mach/regs-mct.h>
#include <asm/mach/time.h>
+enum {
+ MCT_INT_SPI,
+ MCT_INT_PPI
+};
+
static unsigned long clk_cnt_per_tick;
static unsigned long clk_rate;
+static unsigned int mct_int_type;
struct mct_clock_event_device {
struct clock_event_device *evt;
void __iomem *base;
+ char name[10];
};
-struct mct_clock_event_device mct_tick[2];
+struct mct_clock_event_device mct_tick[NR_CPUS];
static void exynos4_mct_write(unsigned int value, void *addr)
{
@@ -42,57 +54,53 @@ static void exynos4_mct_write(unsigned int value, void *addr)
__raw_writel(value, addr);
- switch ((u32) addr) {
- case (u32) EXYNOS4_MCT_G_TCON:
- stat_addr = EXYNOS4_MCT_G_WSTAT;
- mask = 1 << 16; /* G_TCON write status */
- break;
- case (u32) EXYNOS4_MCT_G_COMP0_L:
- stat_addr = EXYNOS4_MCT_G_WSTAT;
- mask = 1 << 0; /* G_COMP0_L write status */
- break;
- case (u32) EXYNOS4_MCT_G_COMP0_U:
- stat_addr = EXYNOS4_MCT_G_WSTAT;
- mask = 1 << 1; /* G_COMP0_U write status */
- break;
- case (u32) EXYNOS4_MCT_G_COMP0_ADD_INCR:
- stat_addr = EXYNOS4_MCT_G_WSTAT;
- mask = 1 << 2; /* G_COMP0_ADD_INCR write status */
- break;
- case (u32) EXYNOS4_MCT_G_CNT_L:
- stat_addr = EXYNOS4_MCT_G_CNT_WSTAT;
- mask = 1 << 0; /* G_CNT_L write status */
- break;
- case (u32) EXYNOS4_MCT_G_CNT_U:
- stat_addr = EXYNOS4_MCT_G_CNT_WSTAT;
- mask = 1 << 1; /* G_CNT_U write status */
- break;
- case (u32)(EXYNOS4_MCT_L0_BASE + MCT_L_TCON_OFFSET):
- stat_addr = EXYNOS4_MCT_L0_BASE + MCT_L_WSTAT_OFFSET;
- mask = 1 << 3; /* L0_TCON write status */
- break;
- case (u32)(EXYNOS4_MCT_L1_BASE + MCT_L_TCON_OFFSET):
- stat_addr = EXYNOS4_MCT_L1_BASE + MCT_L_WSTAT_OFFSET;
- mask = 1 << 3; /* L1_TCON write status */
- break;
- case (u32)(EXYNOS4_MCT_L0_BASE + MCT_L_TCNTB_OFFSET):
- stat_addr = EXYNOS4_MCT_L0_BASE + MCT_L_WSTAT_OFFSET;
- mask = 1 << 0; /* L0_TCNTB write status */
- break;
- case (u32)(EXYNOS4_MCT_L1_BASE + MCT_L_TCNTB_OFFSET):
- stat_addr = EXYNOS4_MCT_L1_BASE + MCT_L_WSTAT_OFFSET;
- mask = 1 << 0; /* L1_TCNTB write status */
- break;
- case (u32)(EXYNOS4_MCT_L0_BASE + MCT_L_ICNTB_OFFSET):
- stat_addr = EXYNOS4_MCT_L0_BASE + MCT_L_WSTAT_OFFSET;
- mask = 1 << 1; /* L0_ICNTB write status */
- break;
- case (u32)(EXYNOS4_MCT_L1_BASE + MCT_L_ICNTB_OFFSET):
- stat_addr = EXYNOS4_MCT_L1_BASE + MCT_L_WSTAT_OFFSET;
- mask = 1 << 1; /* L1_ICNTB write status */
- break;
- default:
- return;
+ if (likely(addr >= EXYNOS4_MCT_L_BASE(0))) {
+ u32 base = (u32) addr & EXYNOS4_MCT_L_MASK;
+ switch ((u32) addr & ~EXYNOS4_MCT_L_MASK) {
+ case (u32) MCT_L_TCON_OFFSET:
+ stat_addr = (void __iomem *) base + MCT_L_WSTAT_OFFSET;
+ mask = 1 << 3; /* L_TCON write status */
+ break;
+ case (u32) MCT_L_ICNTB_OFFSET:
+ stat_addr = (void __iomem *) base + MCT_L_WSTAT_OFFSET;
+ mask = 1 << 1; /* L_ICNTB write status */
+ break;
+ case (u32) MCT_L_TCNTB_OFFSET:
+ stat_addr = (void __iomem *) base + MCT_L_WSTAT_OFFSET;
+ mask = 1 << 0; /* L_TCNTB write status */
+ break;
+ default:
+ return;
+ }
+ } else {
+ switch ((u32) addr) {
+ case (u32) EXYNOS4_MCT_G_TCON:
+ stat_addr = EXYNOS4_MCT_G_WSTAT;
+ mask = 1 << 16; /* G_TCON write status */
+ break;
+ case (u32) EXYNOS4_MCT_G_COMP0_L:
+ stat_addr = EXYNOS4_MCT_G_WSTAT;
+ mask = 1 << 0; /* G_COMP0_L write status */
+ break;
+ case (u32) EXYNOS4_MCT_G_COMP0_U:
+ stat_addr = EXYNOS4_MCT_G_WSTAT;
+ mask = 1 << 1; /* G_COMP0_U write status */
+ break;
+ case (u32) EXYNOS4_MCT_G_COMP0_ADD_INCR:
+ stat_addr = EXYNOS4_MCT_G_WSTAT;
+ mask = 1 << 2; /* G_COMP0_ADD_INCR w status */
+ break;
+ case (u32) EXYNOS4_MCT_G_CNT_L:
+ stat_addr = EXYNOS4_MCT_G_CNT_WSTAT;
+ mask = 1 << 0; /* G_CNT_L write status */
+ break;
+ case (u32) EXYNOS4_MCT_G_CNT_U:
+ stat_addr = EXYNOS4_MCT_G_CNT_WSTAT;
+ mask = 1 << 1; /* G_CNT_U write status */
+ break;
+ default:
+ return;
+ }
}
/* Wait maximum 1 ms until written values are applied */
@@ -321,9 +329,8 @@ static inline void exynos4_tick_set_mode(enum clock_event_mode mode,
}
}
-static irqreturn_t exynos4_mct_tick_isr(int irq, void *dev_id)
+static int exynos4_mct_tick_clear(struct mct_clock_event_device *mevt)
{
- struct mct_clock_event_device *mevt = dev_id;
struct clock_event_device *evt = mevt->evt;
/*
@@ -335,7 +342,20 @@ static irqreturn_t exynos4_mct_tick_isr(int irq, void *dev_id)
exynos4_mct_tick_stop(mevt);
/* Clear the MCT tick interrupt */
- exynos4_mct_write(0x1, mevt->base + MCT_L_INT_CSTAT_OFFSET);
+ if (__raw_readl(mevt->base + MCT_L_INT_CSTAT_OFFSET) & 1) {
+ exynos4_mct_write(0x1, mevt->base + MCT_L_INT_CSTAT_OFFSET);
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+static irqreturn_t exynos4_mct_tick_isr(int irq, void *dev_id)
+{
+ struct mct_clock_event_device *mevt = dev_id;
+ struct clock_event_device *evt = mevt->evt;
+
+ exynos4_mct_tick_clear(mevt);
evt->event_handler(evt);
@@ -360,14 +380,10 @@ static void exynos4_mct_tick_init(struct clock_event_device *evt)
mct_tick[cpu].evt = evt;
- if (cpu == 0) {
- mct_tick[cpu].base = EXYNOS4_MCT_L0_BASE;
- evt->name = "mct_tick0";
- } else {
- mct_tick[cpu].base = EXYNOS4_MCT_L1_BASE;
- evt->name = "mct_tick1";
- }
+ mct_tick[cpu].base = EXYNOS4_MCT_L_BASE(cpu);
+ sprintf(mct_tick[cpu].name, "mct_tick%d", cpu);
+ evt->name = mct_tick[cpu].name;
evt->cpumask = cpumask_of(cpu);
evt->set_next_event = exynos4_tick_set_next_event;
evt->set_mode = exynos4_tick_set_mode;
@@ -384,13 +400,17 @@ static void exynos4_mct_tick_init(struct clock_event_device *evt)
exynos4_mct_write(0x1, mct_tick[cpu].base + MCT_L_TCNTB_OFFSET);
- if (cpu == 0) {
- mct_tick0_event_irq.dev_id = &mct_tick[cpu];
- setup_irq(IRQ_MCT_L0, &mct_tick0_event_irq);
+ if (mct_int_type == MCT_INT_SPI) {
+ if (cpu == 0) {
+ mct_tick0_event_irq.dev_id = &mct_tick[cpu];
+ setup_irq(IRQ_MCT_L0, &mct_tick0_event_irq);
+ } else {
+ mct_tick1_event_irq.dev_id = &mct_tick[cpu];
+ setup_irq(IRQ_MCT_L1, &mct_tick1_event_irq);
+ irq_set_affinity(IRQ_MCT_L1, cpumask_of(1));
+ }
} else {
- mct_tick1_event_irq.dev_id = &mct_tick[cpu];
- setup_irq(IRQ_MCT_L1, &mct_tick1_event_irq);
- irq_set_affinity(IRQ_MCT_L1, cpumask_of(1));
+ gic_enable_ppi(IRQ_MCT_LOCALTIMER);
}
}
@@ -404,7 +424,10 @@ int __cpuinit local_timer_setup(struct clock_event_device *evt)
int local_timer_ack(void)
{
- return 0;
+ unsigned int cpu = smp_processor_id();
+ struct mct_clock_event_device *mevt = &mct_tick[cpu];
+
+ return exynos4_mct_tick_clear(mevt);
}
#endif /* CONFIG_LOCAL_TIMERS */
@@ -419,6 +442,11 @@ static void __init exynos4_timer_resources(void)
static void __init exynos4_timer_init(void)
{
+ if (soc_is_exynos4210())
+ mct_int_type = MCT_INT_SPI;
+ else
+ mct_int_type = MCT_INT_PPI;
+
exynos4_timer_resources();
exynos4_clocksource_init();
exynos4_clockevent_init();
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-19 09:21:59 +0000